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Author Topic: Infrastructure problems in Thames Valley causing disruption elsewhere - ongoing, since Oct 2014  (Read 1244724 times)
ChrisB
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« Reply #675 on: June 04, 2015, 13:09:55 »

the sun?
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Ollie
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« Reply #676 on: June 04, 2015, 13:25:51 »

Network Rail have imposed a heat speed restriction of 20mph between Ladbroke Grove and Paddington. It's expected to removed at 16:00.
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TaplowGreen
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« Reply #677 on: June 04, 2015, 13:33:59 »

the sun?

Can't blame Murdoch for everything!  Wink

But seriously............call this hot? First time the sun comes out......have we got a whole summer of this to look forward to in addition to knackered signals, "train faults" etc etc?Huh
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Worcester_Passenger
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« Reply #678 on: June 04, 2015, 13:36:55 »

Ah, but this is the wrong kind of sun.
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Ollie
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« Reply #679 on: June 04, 2015, 13:46:22 »

Network Rail has a page that explains the impact of heat on the rails if anyone wants a read: http://www.networkrail.co.uk/timetables-and-travel/delays-explained/summer-weather.aspx
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ChrisB
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« Reply #680 on: June 04, 2015, 14:13:49 »

but they need to explain too why our rails have problems at temperatures other countries don't!
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IndustryInsider
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« Reply #681 on: June 04, 2015, 14:45:21 »

Not at all impressive is it?!

Though the section of track affected is only 40mph anyway (with a small bit at 50mph) so with a few services thinned out most others are only suffering minimal delays.
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broadgage
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« Reply #682 on: June 04, 2015, 15:00:26 »

Very poor.
I can understand the need for speed restrictions in exceptionally hot conditions, but to need such restrictions during a moderately warm early summer day is a bit worrying.
What will happen if we get a hot summer ?
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A proper intercity train has a minimum of 8 coaches, gangwayed throughout, with first at one end, and a full sized buffet car between first and standard.
It has space for cycles, surfboards,luggage etc.
A 5 car DMU (Diesel Multiple Unit) is not a proper inter-city train. The 5+5 and 9 car DMUs are almost as bad.
TaplowGreen
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« Reply #683 on: June 04, 2015, 17:53:59 »

Very poor.
I can understand the need for speed restrictions in exceptionally hot conditions, but to need such restrictions during a moderately warm early summer day is a bit worrying.
What will happen if we get a hot summer ?

Phew! A scorching 20 degrees (68 Fahrenheit in old money), God help us if it gets over 80.
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Electric train
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« Reply #684 on: June 04, 2015, 18:49:51 »

There is also a process called CRT(resolve) (Critical Rail Temperature) which can applied in warm weather where civil engineering works disturbs the track formation, shoulder ballast, new UTX (Under Track Crossings) etc.   There is quite a lot of civils activity in the Ladbrook Grove area. 

There is also a cannoning effect caused by the buildings and direction of the sun the area can heat up very quickly with very little wind cooling.  We used to regularly get HV cable joints fail in that area in the summer due to the heating of the sun caused the cables to expand and move.
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Starship just experienced what we call a rapid unscheduled disassembly, or a RUD, during ascent,”
TaplowGreen
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« Reply #685 on: June 18, 2015, 14:22:50 »

............here we go folks! At least it's a lovely sunny day to stand on a platform waiting for a train which may or may not arrive (eventually!) Looks like West Drayton/Hayes/Southall area again  Roll Eyes

Cancellations to services between Slough and London Paddington

Due to signalling problems between Slough and London Paddington some lines are blocked.

Impact:
Train services running to and from these stations may be cancelled, delayed by up to 30 mins or revised. Disruption is expected until 18:00 18/06.
« Last Edit: June 18, 2015, 14:29:30 by TaplowGreen » Logged
BerkshireBugsy
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« Reply #686 on: June 18, 2015, 15:06:05 »

............here we go folks! At least it's a lovely sunny day to stand on a platform waiting for a train which may or may not arrive (eventually!) Looks like West Drayton/Hayes/Southall area again  Roll Eyes

Cancellations to services between Slough and London Paddington

Due to signalling problems between Slough and London Paddington some lines are blocked.

Impact:
Train services running to and from these stations may be cancelled, delayed by up to 30 mins or revised. Disruption is expected until 18:00 18/06.

I must have just missed this - I caught the 13:18 Paddington to bedwyn and had no problems with the journey at all
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eightf48544
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« Reply #687 on: June 18, 2015, 16:00:01 »

Looking at the departure boards it looks as if the disruption is not too bad at the moment. 16:00
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Electric train
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« Reply #688 on: June 18, 2015, 18:33:20 »

I actually think the FGW (First Great Western) staff and the NR» (Network Rail - home page) staff are managing these disruptions quite well over the last few weeks. 

The Padd dispatch team on 13 & 14 are turning the trains around as quick as they can whilst still letting passengers get there from the main concourse when there is a late announcement.
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Starship just experienced what we call a rapid unscheduled disassembly, or a RUD, during ascent,”
broadgage
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« Reply #689 on: June 23, 2015, 19:59:03 »

Numerous cancellations and short workings for most of today, many of the earlier problems due to overhead wire problems, together a few signalling failures and train faults.
Most of the later evening issues caused by a fatality Cry
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A proper intercity train has a minimum of 8 coaches, gangwayed throughout, with first at one end, and a full sized buffet car between first and standard.
It has space for cycles, surfboards,luggage etc.
A 5 car DMU (Diesel Multiple Unit) is not a proper inter-city train. The 5+5 and 9 car DMUs are almost as bad.
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